1 Jan
2009
1 Jan
'09
7:29 p.m.
Ok,
I got another one - now with picture! ;)
It is labeled
DDU-4-
7992
The picture can be seen here:
http://pics.pofo.de/gallery/v/S8000/S8000_boards/P1070269.JPG.html
Wild guessing.... resistornetwork? capacitornetwork (was something like
that around?)?
Greetings, Oliver
--
Oliver Lehmann
http://www.pofo.de/
http://wishlist.ans-netz.de/
8:34 p.m.
Chuck Guzis wrote:
On 1 Jan 2009 at 20:29, Oliver Lehmann wrote:
Ah - running ddu4 +delay +line through google the following pdf was shown
http://www.datasheet5.com/download.asp?id=OCPNRMMWNPRNN
Looks like you where right ;) Regardingg the naming convention showed in
this pdf 992 could indicate 992ns but 992 sounds "suspicious"
--
Oliver Lehmann
http://www.pofo.de/
http://wishlist.ans-netz.de/
I got another one - now with picture! ;)
It is labeled
DDU-4-
7992
Looks like a delay line to me. 
8:11 p.m.
Oliver Lehmann wrote:
I got another one - now with picture! ;)
It is labeled
DDU-4-
7992
The picture can be seen here:
http://pics.pofo.de/gallery/v/S8000/S8000_boards/P1070269.JPG.html
Wild guessing.... resistornetwork? capacitornetwork (was something like
that around?)?
I can't say I recognise the specific device shown, but sometimes delay lines
were packaged like that.
(Guess: [Digital|Discrete] Delay Unit - 4 uS ?).
(Pulse transformers also were put in such packages in the mid-late 70's, but
they are generally associated with core memory drivers.)
8:44 p.m.
Oliver Lehmann wrote:
http://pics.pofo.de/gallery/v/S8000/S8000_boards/P1070269.JPG.html
Wild guessing.... resistornetwork? capacitornetwork (was something like
that around?)?
That logo belongs to Data Delay Devices, who are still in business:
<http://www.datadelay.com/>
Their part number index lists the DDU4:
<http://www.datadelay.com/asp/alphanum.asp>
With a datasheet here:
<http://www.datadelay.com/datasheets/ddu4.pdf>
But there's nothing about a DDU-4-7992 in there at all. Based on the naming
convention, I'd be inclined to think it was a 7-output delay line, with a
total delay of 992 nanoseconds. 992ns seems a bit dubious though.
It might be worth emailing their tech support department (email address is at
the top of the part number index) and asking them about the meaning of the
'7992' part number suffix.
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/
8:49 p.m.
Philip Pemberton wrote:
It might be worth emailing their tech support
department (email address is at
the top of the part number index) and asking them about the meaning of the
'7992' part number suffix.
Yeah... done this right now :)
--
Oliver Lehmann
http://www.pofo.de/
http://wishlist.ans-netz.de/
9:34 p.m.
I got another one - now with picture! ;)
It is labeled
DDU-4-
7992
The picture can be seen here:
http://pics.pofo.de/gallery/v/S8000/S8000_boards/P1070269.JPG.html
Wild guessing.... resistornetwork? capacitornetwork (was something like
that around?)?
I'm pretty sure this is a delay line. Is this a XT board?
10:30 p.m.
On 1 Jan 2009 at 19:34, Alexandre Souza wrote:
I'm pretty sure this is a delay line. Is this
a XT board?
Not with a card release (black plastic thing just visible on the left
of the card).
Hey Oliver, how about posting a photo of the whole card? I'm curious
as to what bus this thing might reside on...
Thanks,
Chuck
11:06 p.m.
Chuck Guzis wrote:
Hey Oliver, how about posting a photo of the whole
card? I'm curious
as to what bus this thing might reside on...
I'm not Oliver, but it looks like it's this board:
<http://pics.pofo.de/gallery/v/S8000/S8000_boards/ecc_front.jpg.html>
The delay line is 5th IC down, 2nd from the left.
Based on the rest of the photos in the "S8000" album (and the screen-print on
the PCB), I'm inclined to think it's a Zilog System 8000 (S8000) ECC
controller board.
More info here: <http://www.pofo.de/S8000/>
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/
11:56 p.m.
On 1 Jan 2009 at 23:06, Philip Pemberton wrote:
Chuck Guzis wrote:
Good spotting! So it's DEFINITELY not an XT board... :)
Cheers,
Chuck
Hey Oliver, how about posting a photo of the
whole card? I'm curious
as to what bus this thing might reside on...
I'm not Oliver, but it looks like it's this board:
<http://pics.pofo.de/gallery/v/S8000/S8000_boards/ecc_front.jpg.html>
The delay line is 5th IC down, 2nd from the left.
Based on the rest of the photos in the "S8000" album (and the screen-print on
the PCB), I'm inclined to think it's a Zilog System 8000 (S8000) ECC
controller board.
2 Jan
2 Jan
10:21 a.m.
Philip Pemberton wrote:
I'm not Oliver, but it looks like it's this
board:
<http://pics.pofo.de/gallery/v/S8000/S8000_boards/ecc_front.jpg.html>
The delay line is 5th IC down, 2nd from the left.
Based on the rest of the photos in the "S8000" album (and the screen-print on
the PCB), I'm inclined to think it's a Zilog System 8000 (S8000) ECC
controller board.
More info here: <http://www.pofo.de/S8000/>
Good digging up - and all is completly right ;)
I just thought that posting a photo where the IC can be seen without
having to look at the big version of the photo (bandwith... ;)) suits
better...
--
Oliver Lehmann
http://www.pofo.de/
http://wishlist.ans-netz.de/
9 Jan
9 Jan
9:18 a.m.
On Thursday 01 January 2009 02:29:15 pm Oliver Lehmann wrote:
Ok,
I got another one - now with picture! ;)
It is labeled
DDU-4-
7992
The picture can be seen here:
http://pics.pofo.de/gallery/v/S8000/S8000_boards/P1070269.JPG.html
Wild guessing.... resistornetwork? capacitornetwork (was something like
that around?)?
Delay line.
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, a critter that can
be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
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11 comments
6 participants
participants (6)
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alexandre-listas＠e-secure.com.br -
cclist＠sydex.com -
classiccmp＠philpem.me.uk -
hilpert＠cs.ubc.ca -
lehmann＠ans-netz.de -
rtellason＠verizon.net